configure, configure.in: Added fseek64 and ftell64.

configure, configure.in: Added fseek64 and ftell64.
config.h.in: Added fseek64 and ftell64.
includes.h: Added definition of SMB_BIG_INTEGER.
smb.h: Changed (*getsmbpwpos) and (*setsmbpwpos) to use SMB_BIG_INTEGER.
access.c: Tidyup of dbug statement.
system.c: Added sys_fseek and sys_ftell. Changed mode calls to use mode_t.
asyncdns.c: Tidyup of comment.
loadparm.c: Tidyup of set_default_server_announce_type() function definition.
ldap.c: Changed (*getsmbpwpos) and (*setsmbpwpos) to use SMB_BIG_INTEGER.
nispass.c: Changed (*getsmbpwpos) and (*setsmbpwpos) to use SMB_BIG_INTEGER.
smbpass.c: Changed (*getsmbpwpos) and (*setsmbpwpos) to use SMB_BIG_INTEGER.
smbpassfile.c: Use sys_fseek().
chgpasswd.c: Tidyup of debug statement.
dosmode.c: Changed mode calls to use mode_t.
ipc.c: Removal of dead code.
nttrans.c: Changed mode calls to use mode_t.
open.c: Changed mode calls to use mode_t.
pipes.c: Removal of dead code.
reply.c: Removal of dead code.
trans2.c: Removal of dead code. Changed mode calls to use mode_t.
Jeremy.